Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840791 | Hair-waving process | Roger A. Mathews, David W. Cannell | 1989-06-20 |
| 4816246 | Permanent wave composition | Roger A. Mathews, David W. Cannell | 1989-03-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840791 | Hair-waving process | Roger A. Mathews, David W. Cannell | 1989-06-20 |
| 4816246 | Permanent wave composition | Roger A. Mathews, David W. Cannell | 1989-03-28 |